As nouns the difference between politeness and courteousness
is that politeness is the quality of being polite while courteousness is the characteristic of being courteous.
politeness
Noun
(en-noun)
The quality of being polite.
Synonyms
* (the act of being polite): affability, civility, courtliness, etiquette
Antonyms
* (the act of being polite): impoliteness, rudeness
courteousness
English
Noun
(-)
The characteristic of being courteous.